using System;
using Unity.Behavior;
using UnityEngine;
using Action = Unity.Behavior.Action;
using Unity.Properties;

[Serializable, GeneratePropertyBag]
[NodeDescription(name: "ChaseTarget", story: "타겟 추적", category: "Action", id: "0889fbb015b8bf414ef569af08bb6868")]
public partial class ChaseTargetAction : Action
{

    [SerializeReference]
    public BlackboardVariable<GameObject> Target;
    
    [SerializeReference]
    public BlackboardVariable<float> Speed = new BlackboardVariable<float>(0f);
    
    [SerializeReference]
    public BlackboardVariable<float> StopDistance = new BlackboardVariable<float>(2f);

    private UnityEngine.AI.NavMeshAgent agent;

    protected override Status OnStart()
    {
        if (Target.Value == null)
        {
            return Status.Failure;
        }

        agent = GameObject.GetComponent<UnityEngine.AI.NavMeshAgent>();
        if (agent == null)
        {
            Debug.LogWarning("[ChaseTarget] NavMeshAgent not found");
            return Status.Failure;
        }

        // Speed가 0 이하면 NavMeshAgent의 기존 speed 유지 (EnemyData에서 설정한 값)
        if (Speed.Value > 0f)
        {
            agent.speed = Speed.Value;
        }
        agent.stoppingDistance = StopDistance.Value;
        agent.isStopped = false;

        return Status.Running;
    }

    protected override Status OnUpdate()
    {
        if (Target.Value == null)
        {
            return Status.Failure;
        }

        // 이미 사거리 내에 있으면 성공
        float distance = Vector3.Distance(GameObject.transform.position, Target.Value.transform.position);
        if (distance <= StopDistance.Value)
        {
            agent.isStopped = true;
            return Status.Success;
        }

        // 타겟 위치로 이동
        agent.SetDestination(Target.Value.transform.position);
        return Status.Running;
    }

    protected override void OnEnd()
    {
        if (agent != null)
        {
            agent.isStopped = true;
        }
    }
}